Tank truck bottom loading and discharge means



Sept M, 1945. H. c. KRONE ET AL.

TANK TRUCK BOTTOM LOADING AND DISCHARGE MEANS Filed June 6, 1944 3 Sheets-Sheet l INVENTORS:

Sept. 11, 1945. H. c. KRONE ET AL 2,384,628

TANK TRUCK BOTTOM LOADING AND DISCHARGE MEANS lll/1111111111;

INVENTORS.'

, ATTORNEY.

Spt. H, 1945.

H. c. KRONE ET AL TANK TRUCK BOTTOM LOADING AND DISCHARGE MEANS 3 Sheets-Sheet 5 Filed June 6, 1944 Q uw@ l uw k V |1H mk MN m wm W mw @Cu H.

?tented ept. il, i945 TANK TRUCK BT'EM EBADHNG Al DESC i GE MEMS Howard C. Krone, Ridgewood, and William Meyer. East Orange, N. J., assigner-s to Wheaton Brass Works, Newark, N. i., a corporation ci New l.llersey .application .lune 6, i944, Serial No. 538.9%

12 Claims. (Qi. ll--Gi) This invention relates to improvements in means ior loading and discharging tank trucks such as used for transporting various kinds of liquids, and especially liquids such as oil and gasoline or other combustible liquids.

The invention has for an object to provide novel means for loading and discharging tank trucks, whereby the same valve and conduit system employed for discharging the liquid content of a tank truck may also be used for lling or loading the same; whereby the tank loading or filling operations may be more rapidly carried out; Whereby losses incidental to filling and discharging operatlons are substantially prevented; and whereby accident and tire hazards'drring both loading and discharging operations are substantially eliminated.

The invention has i'or another object to provide at the bottom of a tank truck a novel construction of dual emergency valve means having in combination therewith means for manually open` lng the same; said dual emergency valve means including self-contained means for holding the same open during lling operations, and cooperative float controlled means for automatically closing the same when the liquid loaded into the tank reaches a predetermined level.

The invention has for a further object to provide a conduit system extending from said dual emergency valve means including, at its outer terniinal end, a manually actuatable intake and discharge valve means-and a cooperating loading valve means respectively provided with cooperative quick acting coupling means for joining the same in operative relation, whereby, when so joined, opening of the intake valve means automatically opens the loading valve means, while closing of said intake valve means automatically closes the loading valve means; thus assuring closed condition of both said valve means before they are disconnected one from the other, and consequently eliminating drainage or spill of liq uid therefrom, so that losses are substantially prevented, and, when the liquid is combustible, rc hazards are substantially avoided.

Other objects of this invention, not at this time more particularly enumerated, will be understood trom the following detailed description of the same.

.an illustrative embodiment of this invention is shown in the accompanying drawings, in which:

Fig. l is an elevational View of the novel loading and discharge means as applied to the tank of a tank truck.

Fie: 2 is an enlarged sectional view ol the dual emergency valve means which is mounted in the bottom ci the tank oi the tank truck, showing said valve means in open condition; and Fig. 3 is a similar view, showing said valve means in closed condition.

Fig. e is an enlarged sectional view oi the intake valve means and loading valve means operatively coupled together, and with the valve members thereof shown in open condition; and Fig. 5 ls a similar view, showing the intake valve means and loading valve means in disconnected relation with their valve members closed.

Similar characters of reference are employed in the above described views, to indicate corresponding parts.

in the drawings, the reference character lil lndicatcs the tank of a tank truck, the truck chassis by which it is carried being omitted. Mounted in the bottom ofrsaid tank l@ is a dual emergency valve means A, from the exterior end of which extends a conduit E. If the tank is divided interiorly into several compartments, as is frequently -the case, each compartment is served by a similar dual emergency valve means A and connected conduit B, in which case, the several conduits B are joined to a common manifold C. in the manner well known to the art. Amxed to the intake end of the manifold C is an intake and discharge valve means D to which is detachably coupled, by suitable coupling means, a loading valve E which may be optionally connected to and carried by an end oi' a nliing or discharge hose F, as the case may be.

The dual emergency valve means A comprises a casing suitably shaped to provide an external body portion il .having a lower valve chamber l2 er:u tending from its bottom end, and an upper valve chamber i3 extending from its top end. Said body portion l i is provided with an annular ange it adjacent its top end by which the same may be secured to the bottom of the tank l@ so as to depend therefrom. and so as to dispose the upper valve chamber it within and in communication with the lower interior of said tank.

Extending transversely across said body portion li, intermediate its lower end portion and the lower vaive chamber l, is a transverse partition l5. Said partition is provided with a lower valve port le, around the under side margin of which is a downwardly offset valve seat il., In like mam ner, extending transversely across said body portion il, intermediate its top end portion and the upper valve chamber i3, is a second transverse partition it. Said partition i3 is provided with an upper valve port is, around the upper side 2 assenso margin of which is an upwardly onset valve seat 23.

Leading into the side of said lower valve chamber I2 is a liquid passage extension 2| to which a conduit B may be suitably connected. The bottom end of said lower valve chamber I2 is closed by a detachable bonnet 22 having an axial guide member 23, in which is slidably supported the stem 2l of a lower valve member 25 which is opposed to the lower valve port I for cooperation with its valve seat I1. Said lower valve member 25 is provided on its upper or port facing side with a thrust receiving member 23. Secured between the valve member 25 and said thrust receiving member 25 is a valve washer 21 of suitable material for cooperation with said valve seat I1. Said lower valve member 25 is yieldably urged toward the valve seat I1 by a compression spring 23.

The upper valve chamber I3 is provided in its sides with openings 23 to afford communication between its interior and the interior of the tank I Il into which it projects. The top end of said upper valve chamber I3 is closed by a detachable bonnet having an axial guide member 3I through which slidably extends the upwardly projecting stem 32 of an upper valve member 33 which is opposed to the upper valve port I3 for cooperation with its valve seat 20. Said upper valve member 33 is provided on its lower or port facing side with a thrust receiving member 33. Secured between said valve member 33 and said thrust receiving member 33 is a valve washer 35 of suitable material for cooperation with said valve seat 20. Said upper valve member is yieldably urged toward the valve seat 20 by a compression spring 36.

Journaled across the axis of the `valve body portion II, intermediate the lower and upper valve members 25 and 33 is a transverse spindle 31 upon which is fixed, to turn therewith, the hub 33 of a bell-crank member having lower and upper radial arms 39 and 30 disposed in suitable angular relation. An exterior end of said spindle 31 projects exteriorly from a side of said valve body portion II through a stuillng-box (not shown), but in a manner well known to the valve art. The lower bell-crank arm 39 is connected with a lower toggle-lever means which cooperates with the lower valve member 25 for moving the latter to open position; and, in like manner, the upper bell-crank arm 40 is connected with a similar upper toggle-lever means which cooperates with the upper valve member 33 for moving it to open position. Said lower toggle lever means comprises a lever bar 3 I, one end of which is pivotally connected by a pivot pin 42 to the valve body portion II at one side thereof (e. g. the left hand side as shown in Figs. 2 and 3), somewhat above the lower valve port I5. Inierconnecting the free end of said lever bar Il with the free end of the lower bell-crank arm 33 is a link 33. Mounted in connection with the pivotally joined ends of said lever bar 3| and link 33 is an anti-friction roller 34 which engages th'e thrust receiving member 25 of the lower valve member 25. Similarly, said upper toggle lever means comprises a lever bar 45, one end of which is pivotally connected by a pivot pin I5 to the valve body portion I I at the opposite side thereof (e. g. the right hand side as shown in Figs. 2 and 3), somewhat below the upper valve port I3. Interconnecting the free end of said lever bar 35 with the free end of the upper bell-crank arm 33 is a link 31. Mounted in connection with the pivotally joined ends of said lever bar 45 and link 41 is an antifriction roller 33 which engages the thrust receiving member 33 of the upper valve member 33.

Amxed to the external end of the spindle 31 is a toggle lever system actuating lever 33. Connected with said actuating lever 43 is a pull-cable 53 which extends to an emergency valve operator means, which e. g. is preferably of the general type and kind shown in our prior United States Letters Patent No. 2,220,420. dated Nov. 19, 1940, and which' is usually located at the rear of a truck tank. In a general way, such emergency valve operator means comprises a pivoted hand lever 5I to which the outer end of the pull-cable 53 is suitably attached, said hand-lever having a latch means 52 engageable with a holding means 53 for detaining, at desired times, the hand lever in emergency valve opening position, and including trip means 53 for releasing said latch means from engaged relation to said holding means. Preferably, said pull-cable runs through a guide conduit 55 arranged to extend from said operator means to a point adjacent to said actuating lever 33.

Trippable detent means is provided for releasably holding the valve members 25 and 33 in an open position, after the same have been moved thereto by operation of the toggle lever system. This detent means comprises a trip lever 56 pivotally moimted on an external fulcrum ear 51 which projects externally from the bonnet 30 of the upper valve chamber I3 adjacent to the upwardly and externally extending portion of the upper valve member stem 32. Said trip lever 55 is provided with a suitably shaped seat or stop shoulder 53, having, at its inward side, an upstanding push finger 53. Pivotally suspended from the upper free end portion of the valve stem 32 is a swingable detent member 50 which is provided, at its lower free end, with an anti-friction roller 5I adapted to engage the seat or stop shoulder 53 of the trip lever 55.

Said trippable detent means is subject to operation by a float controlled means which is mounted within the upper interior of the tank I Il (see Fig. 1). In an illustrative form thereof, as sh'own, said float controlled means comprises a supporting bracket xture 52, which is suitably afilxed to the tank wall. Pivotally supported by said bracket fixture 52 is a lift lever 53. Slidably supported by its oppositely extending perpendicular slide rods 64, which are. slidably mounted in and between vertically spaced perforate guide members 55 with which the bracket xture is provided, is a oat member 55. `Said float member 55 is connected, by a pivotal connection 51, with the free end of the lift lever 53, whereby to produce upward swinging movement of the latter when said float member is buoyed up by the rising liquid delivered into the tank through the open valve members 25 and 33. Said trip lever 56 is interconected with said lift lever 53 by a cable or rod 53.

The intake and discharge valve means D (see Figs. 4 and 5) at the outer terminal end of the conduit system B-C, comprises a suitably formed casing 53 having a spigot portion 10 at its free end. 'I'he transverse face wall of said spigot portion 13 is provided with an axially aligned valve port 1I, around the exterior side margin of which is an outwardly oil'set valve seat 12. Cooperative with said valve port 1I and its seat 12 is an outwardly opening intake and discharge valve member 13, the stem 13 of which' extends rearwardly into the interior of the casing 53, being slidably supported by spaced axial guide members 18 and 16 which are carried by spider arms 11 extending between the same and the side walls of said casing 69. Fixed on said valve stem 14 is a thrust collar 18, upon which bears a compression spring 19 operative to yieldably urge saidl valve member 13 toward the seat 12 and to closed relation to the valve port 1|. Journaled across the casing 89 in suitable location is a spindle 80 upon which is fixed an actuating cam 8| cooperative with said stem 14 for moving the valve member 13 to outwardly projectedpvalve port opening position. An exterior end of said spindle 88 projects exteriorly from a side of said valve casing 89 through a stuillng box (not shown), but in a manner well known to the valve art. Amxed to the external end of saidsplndle 80 is hand lever 82 for turning the 'same and the cam 8| carried thereby.

The loading valve E which is connected with the free end of a conduit or hose F, and which' is adapted to be detachably coupled to the intake and dischargev valve D, comprises a suitably formed casing 83 having a bell portion 84 at its free end whichis'telescopically engageable with and over the spigot portion of said intake and discharge valve D. Means is provided for releasably coupling these bell and spigot portions against separation, the same preferably comprising a quick acting type such as disclosed in our co-pending application for United States Letters Patent Serial No. 513,518, filed Dec. 9, 1943, which is characterized by spring released latch-pieces 85 carried by the bell portion 84 subject to inward movement by an external slide collar 88 mounted on the latter, whereby to enter an annular latch socket 81 with which said spigot portion 18 is Provided.

Said loading valve casing 83 is provided, behind the bell portion 84 thereof, with a transverse partition or wall 88. Said partition or'wall 88 is provided with an axially aligned valve port 89, around the inner side periphery of which is an inwardly offset valve seat 90. Cooperative with said valve port 89 and its seat 98 is an inwardly opening valve member 9|, the stem 92 of which extends into the interior of the casing 83, being slidably supported by a guide member 93 which is carried by spider arms 94 extending between the same and the side walls of said casing 83. Said valve member 9| may be further guided by guide ribs 95 with which the adjacent walls of said casing 83 are internally provided. A compression spring 98 yieldably urges the valve member 9| toward the seat 98 and to closed relation to the valve port 89. Mounted on the lace wall of the intake and discharge valve spigot portion 18 is a suitable sealing gasket 91 adapted to engage the outer face of the loading valve partition or wall 88 when these valves are operatively coupled, whereby to assure a leak-proof joint therebetween.

In the operation of the system for loading or lling the tank I8, a hose or conduit F leading from a source of liquid supply, and which is provided at its free end with the loading valve means E, is coupled .to the intake and discharge valve D, as shown in Figs. 1 and 4. To open the dual emergency valve A, the hand lever `9| is pulled back from the released position shown in Fig. 1, thereby pulling outwardly on the pull-cable 58 and thus swinging the emergency valve actuating lever 49 in counterclockwise direction. Such movement of said lever 49 rotates the bell crank means 38-38-48 in like direction, whereby to transmit,

' by moving the latter to their open positions as shown in Fis. 2.

As the lower valve member 25 completes its movement to full open position, it is preferable that the pivotal connection of the lower bellcrank arm 39 with the link 43 cross somewhat beyond a dead center line extending between the axis .of the spindle 31 and the pivotal connection between the lever bar 4| and opposite end of the link 43, whereby to brace these parts for resistance to the thrust of said lower valve member exerted iby the compressed closing spring 28 of the latter (see Fig. 2). At the same time, the upward opening movement of the upper valve member 33, produced by the bell crank means, slides upwardly its stem 32 to carry upwardly therewith the swingable detent member 80, so

that its free end, and the anti-friction roller 6| f thereon, can swing, under gravity, downwardly over the seat or stop shoulder 58 of the normally lowered trip-lever 58, whereby to be engaged on said seat or stop shoulder so as to resist the thrust of the upper valve member exerted by the compressed closing spring 36 thereof (see Fig. 2). When the described parts are so posi.

tloned, the valve members 25 and 33 will be automatically detained in their-open positions subject to the free ilow of liquid past the same and into the bottom of the tank |0. 'Ihis having been accomplished, the hand lever 5| is returned to released position, whereby to relax the pullcable 49 so as not to impede the reverse valve closing movements of the bell-crank means when the detent means is tripped in the manner hereinafter described.

Afiter the dual emergency valve means has been moved to and detained in open condition as above set forth, the intake and discharge valve means and cooperating loading valve means are openedto the ow of liquid from the source of supply into the tank i8. This is accomplished by pulling back the hand lever 82, whereby to rotate the cam 8| for :thrust against the stem 14 of the intake and discharge valve 13 so as to move the same to open position (see Fig. 4).

' Since the intake and discharge valve 13 abuts the loading'valve 9|, when the casing of the` latter is coupled to that of the former, the opening movement of said intake and discharge valve 13 exerts an opening thrust upon the loading valve 9|, so that both said valves are simultaneously opened to the tank loading flow of liquid (see-Fig. 4). The hand lever 82 may be held open by the operator, or releasable detent means (not shown) may be provided for holding the same open if desired.

The system being opened to the iiow of liquid therethrough, said liquid will be loaded into the` bottom of the tank so as to ll the latter. As :the level of liquid so loaded into the tank rises, and approaches the top of the latter, it will contact the float member .88 so as to buoy up the saine.v As said oat member rises, it will cause an up-swinging movement of the lift lever 83 which will be transmitted through the cable or rod 88 to the trip lever 88, whereby to swing the latter upward. The up-swinging movement of said trip lever 88 thrusts its push nger 59 laterthrough 76 ally against the roller 8| of the detent member Il, thereby displacing the roller from the trip lever seat or stop shoulder Il and out-swinging the detent member to released position (see Fig. 3). Therestraint of the detent member being thus removed, the spring It is released so as to exert closing thrust upon the upper valve member 33 of the dual emergency valve means. 'I'he closing movement of the upper valve member 33 swings downward the lever bar 45, and through' the link 41 reverses the rotation of the bellcrank means, thus collapsing the toggle lever system so that both said upper valve member 33 and lower valve member 25 are moved by their springs to closed positions, and in-ilow of liquid into .the tank is automatically arrested.

The tank I having been loaded, the intake and discharge valve D is closed, thereby at the same time automatically closing the loading valve E, so that the latter may thereupon be disconnected and separated from the former. Liquid in the conduit B-C will be trapped by the thus closed intake and discharge valve D, and liquid -in the hose or conduit F will be likewise trapped by the thus closed loading valve E. 'I'he amount of liquid trapped between the two valves D and 4lil when their valve members are closedl and before the casings are separated, is negligible, and consequently not only is wasting drainage oi' liquid prevented, but ilre hazards are substantially eliminated. In practice a removable closure cap (not shown) would be coupled to engage with the spigot portion 'III of the valve D,

after valve E is detached therefrom.'

'I'he described system is not only usable for loading the tank III, but also for discharging, at will, the liquid from the latter. To discharge the tank, a suitable delivery hose (not shown) is coupled to the spigot portion l0 of the valve D. Before opening the intake and discharge valve 13, the dual emergency valve means is opened. This is done by Pulling back the hand lever 5l to engage its latch means 52 with the holding means 53. The amplitude of hand lever 5| movement for this purpose is less than that required to open the dual emergency valve means far enough to permit engagement of the detent member 60 with the seat or stop shoulder 58 of the trip lever Si, so that the valve members and 33 are not, under such circumstances, subjected to the restraint of the float controlled detent mechanism, but are held open only by said latching of the handlever Il, although sufficiently open to allow required out-ilow of liquid from the tank lll through the dual emergency valve means. As thus opened, the valve membersl 25 and 33 are free to close when the hand lever 5| is released. The emergency valve means being thus opened to out-flow of liquid from the tank l0, the intake and discharge valve 'I3 may be opened by manipulation of -the hand lever 82, whereby to discharge liquid from the tank i0 through the delivery hose to the place of delivery.

We are aware that changes could be made in the devices and parts making up the tank truck bottom loading and discharge means, and that many widely diilerent embodiments of the fea'- tures of this invention could be made without departing from the scope thereof as deilned in the following claims. It is therefore intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in aV limiting sense.

We claim:

l. Bottom loading and discharge means for 75 tank trucks comprising emergency valve means.

communicating with the bottom interior oi' the truck tank, a conduit system communicating with the exterior portion of said emergency valve means, a manualb operable intake and discharge valve at the terminal end of said conduit system adapted to receive coupled connection therewith oi a separable liquid conveying means. means for manually opening said emergency valve means, said Aemergency valve means having self-contained detent means for holding the same open when moved to fully open condition, and liquid level actuated means within the truck tank for automatically releasing said detent means to close said emergency valve when liquid loaded into the tank therethrough reaches a predetermined level. I

2. Bottom loading and discharge means for tank trucks comprising emergency valve means communicatingl with the bottom interior of the truck tank. a conduit system communicating with the exterior portion of said emergency valve means, a manually operable intake and discharge valve at the terminal end of said conduit system adapted to receive coupled connection therewith of a separable liquid conveying means. said liquid Y conveying means having at its coupling end a selfclosing valve means adapted to be opened by opening movement of said intake and discharge valve, means for manually opening said emergency valve means, said emergency valve means having' self-contained detent means i'or holding the same open when moved to `fully open condition, and liquid level actuated means within the truck tank for automatically releasing said detent means to close said emergency valve when liquid loaded into the tank therethrough reaches a predetermined level.

3. Bottom loading and discharge means for tank' trucks comprising emergency valve means communicating with the bottom interior of the truck tank, a conduit system communicating with theexterior portion of said emergency valve means, a manually operable intake and discharge valve at the terminal end of said conduit system adapted to receive coupled connection therewith of a separable liquid conveying means, said liquid conveying means having at its coupling end a selfclosing valve means adapted to be opened by opening movement of said intake and discharge valve, means for manually opening said emergency valve means, said emergency valve means having self-contained detent means for holding the same open when-moved to, f ully open condition, and a iloat controlled means within said truck tank for automatically tripping and releasing said detent means to close said emergency valve when liquid loaded into the tank therethrough reaches a predetermined level. I

4. Bottom loading and discharge means for tank trucks comprising dual emergency valve means communicating with the bottom interior of the truck tank, a conduit system communicating with the exterior portion of said emergency valve means, a manually operable intake and discharge valve at the terminal end of said conduit system adapted to receive coupled connection therewith of a separable liquid conveying means. said dual emergency valve means having a spring-closed valve opening inwardly toward the tank interior and a second spring closed valve opening outwardly toward said conduit system, an actuating means intermediate said valves for effecting simultaneous opening movements thereof, means for manually operating said actuating means for w asa-1,028

detent means for holding said valves open when said act ating means toiully open condition, and

liquid le el actuated means within the truck tank for automatically releasing said detent means to close the valves of said emergency 'valves when liquid loaded into the tank therethrough reaches a predetermined level.

5. Bottom loading and discharge means for tank trucks comprising dual emergency valve means communicating with the bottom interior of the truck tank, a conduit system communicating with the exterior portion of said emergency valve means, a manually operable intake and discharge valve at the terminal end of said conduit system adapted tol receive coupled connection therewith of a separable liquid conveying means, said dual emergency, valve means having a spring closed valve opening inwardly toward the tank' ,interior and a second spring closed valve opening outwardly toward said conduit system, an actuating means intermediate said valves for eiecting si-' multaneous opening movements thereof, means for manually operating said actuating means for opening said `valves, detent means for holding said valves open when the same are moved by said actuating means to fully' open condition, and a iloat controlled means within the truck tank for automatically tripping and releasing said detent means to close the valves of said emergency valve means when lquid loaded into the tank therethrough reaches a predetermined level.

6. Bottom loading and discharge mean'sl for tank trucks comprising dual emergency valve means communicating with the bottom interior of the truck tank, a conduit system communicating with the exterior portion of said emergency A- valve means, a manually operable intake and discharge valve `at the terminal end of said conduit system adapted to receive coupled connection therewith of a separable liquid conveying means, said liquid conveying means having at its coupling end a self-closed valve means adapted to be opened by opening movement or said intake and discharge valve, said dual emergency valve means having a spring closed valve opening inwardly toward the tank interior and a secondspring-closed valve opening outwardly toward said conduit system, a toggle lever means intermediate said valves for effecting simultaneous opening movements thereof, means for' manually actuating said toggle lever means for opening said valves. detent means for holding said valves open when the same are moved -by said toggle lever means to fully open condition, and liquid level actuated means Within the truck tank for automatically releasing said detent means to close said emergency valves when liquid loaded into the tank therethrough reaches a predetermined level.

'1. Bottom loading and discharge means for tank trucks comprising dual .emergency valve means communicating with the bottom interior trolled means within the truck tank for automatically tripping and releasing said detent means to close said emergency valves when liquid loaded into the tank therethrough reaches a predetermined level.

8. In bottom loading and discharge means for tank trucks, `a dual emergency valve means communicating between the bottom interior of said tank on the truck conduit system having a manually operable intake and discharge valve means at its outer end to receive coupled connection therewith of a separable liquid conveying means, said dual emergency valve means having a springclosed valve opening inwardly toward the tank interior and a second spring-closed valve opening outwardly toward ysaid conduit system, an actuating means intermediate said valves for etecting simultaneous opening movements thereof, said inwardly opening valve having a stem project-v ing into the tank interior, a movable detent means carried by said stem, a pivoted trip lever having means operatively engageable :by said detent means for holding said valves open when the same are moved by said actuating means to fully open condition, and a float actuated means within the truck tank and connected with said trip lever for moving the latter to disengage the. detent means for closing said emergency valves when liquid loaded into the tank therethrough reaches a predetermined level.

9. In bottom loading and discharge means for tank trucks, a dual emergency valve means communicating between the bottom interior of said tank` and the truck conduit system having a manually operable intake and discharge valve means at its outer end to receive coupled cona spring-closed valve opening inwardly toward lthe tank interior and a second spring-closed valve opening outwardly toward said conduit system. a rotatable bell-crank means intermediate said valves, toggle lever means for each said valve a spindle for mounting of the truck tank, a conduit system communicating with the exterior 'portion of said emergency valve means, a manually operable intake and discharge valve at the terminal end of said conduit system adapted to receive (coupled connection therewith of a separable liquid conveying means,

said liquid conveying means having at its coupling end a self-closed valve means adapted to be opened by opening movement of said intake and discharge valve, said dual emergency valve means having a spring closed valve opening inwardly toward the tank interior and a second springoperable by said bell-crank means for eiecting simultaneous openingfmovements of said valves, l said bell-crank means' having a portion exteriorly projecting from said emergency valve means, an actuating lever on the exterior portion of said spindle, a pivoted hand lever remote from said emergency valve means, a pull-cable operatively interconnecting said actuating lever and hand lever, detent means for holding said valves open when the same are moved to fully open condition, and liquid level 4 actuated means 'within the truck tank for automatically releasing said detent means to clcse said valves when liquid loaded into the tank therethrough reaches a predetermined level;

10. In bottom loading and discharge means for tank trucks, a dual emergency valve means communicating between the bottom interior ofv said tank and the truck conduit system having a manually operable intake and discharge valve at its outer end to receive coupled connection therewith of a separable liquid conveying means, said dual emergency valve means having a spring-closed valve opening inwardly toward the tank interior and a second spring-closed valve opening outwardly toward said conduit system, a rotatable bell-crank means intermediate said valves, toggle-lever means for each said valve operable by said bell-crank means for eilecting simultaneous opening movements oi said valves,

into the tank interior, a movable detent means carried by said stem, a pivoted trip 'lever having means operatively engageable by said detent means for holding said valves open when the same are moved to fully opened condition, and a iloat actuated means within the truck tank and connected with said trip lever for moving the latter to disengage the detent means for closing said emergency valves when liquid loaded into the tank therethrough reaches a predetermined level.

1l. In bottom loading and discharge means for tank trucks, a dual emergency valve means communicating between the bottom interior of said tank and the truck conduit system having a manually operable intake and discharge valve means at its outer end to secure coupled connection therewith oi' a separable liquid conveying means, said dual emergency valve means having a valve opening inwardly toward the tank interior and a second valve opening outwardly toward said truck conduit system, an actuating means intermediate said valves for eii'ecting simultaneous opening movements thereof, said actuating means including an operating spindle having aportion exteriorly projecting from said emergency valve means, an actuating lever on vsaid exterior portion oi.' said spindle, a pivoted outwardly opening valve, an actuating means` intermediate said valves for etl'ecting simul taneous opening movements thereof, a manually operable means remote from but connected with said actuating means for operating the latter, said inwardly opening valv`e having a stem projecting into the tank interior, a movable detent vmeans carried by said stem, a pivoted trip lever having means operatively engageable by said detent means for holding said valves open when the same are moved to fully opened condition, and a iloat actuated means within the truck tank and connected with said trip lever for moving the latter to disengage the detent means for closing said emergency valves when liquid loaded into the tank'therethrough reaches a predetermined level.

HOWARD C. KRONE.

WILLIAM lVi'EYER. 

